phosphorus

Chemical element
P
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Next: sulfur (S)

Borrowed from Latin phōsphorus, from Ancient Greek φωσφόρος (phōsphóros, “the bearer of light”), from φῶς (phôs, “light”) + φέρω (phérō, “to bear, carry”).

• (Received Pronunciation) enPR: fŏsʹfə-rəs, fŏsʹfrəs, IPA^(key): /ˈfɒs.fə.ɹəs/, /ˈfɒs.fɹəs/
• (US) enPR: fäsʹfər-əs, IPA^(key): /ˈfɑs.fɚ.əs/

  • Audio (US):

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• Homophones: phosphorous, Phosphorus

phosphorus (countable and uncountable, plural phosphoruses or phosphori)

2. (chemistry) a chemical element (symbol P) with an atomic number of 15, that exists in several allotropic forms.
   • For quotations using this term, see Citations:phosphorus.
3. (obsolete) any substance exhibiting phosphorescence; a phosphor.
   • For quotations using this term, see Citations:phosphorus.

• Do not confuse phosphorus with phosphorous, which is an adjective.

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Chemical element
P
Previous: silicium (Si)
Next: sulfur (S)

From Ancient Greek φωσφόρος (phōsphóros, “light-bearing”).

• (Classical Latin) IPA^(key): /ˈpʰoːs.pʰo.rus/, [ˈpʰoːs̠pʰɔrʊs̠]
• (modern Italianate Ecclesiastical) IPA^(key): /ˈfos.fo.rus/, [ˈfɔsforus]

phōsphorus m (genitive phōsphorī); second declension

1. (New Latin, chemistry) phosphorus

Second-declension noun.

Case	Singular	Plural
Nominative	phōsphorus	phōsphorī
Genitive	phōsphorī	phōsphorōrum
Dative	phōsphorō	phōsphorīs
Accusative	phōsphorum	phōsphorōs
Ablative	phōsphorō	phōsphorīs
Vocative	phōsphore	phōsphorī

• French: phosphore
• Galician: fósforo
• Italian: fosforo
• Portuguese: fósforo
• Romanian: fosfor
• Sicilian: pòspuru
• Spanish: fósforo
• Venetan: fòsforo